Carrier 50JZ Guide Technical Information

Carrier is participating inthe Eurovent CertificationProgramme. Products areas listed in the EuroventDirectory of CertifiedProducts.50JZ 024-048Single

101” (25mm) MIN.2” (50TRAPOUTLETINDOORTHERMOSTATDISCONNECTPER IEC*FROMPOWERSOURCERETURNAIRTOP COVERDuct CoversFig. 9 - Typical installationFig. 10 - 5

11Table 1 - Physical data50JZ 024 030 036 048Nominal cooling capacity* kW 6.9 8.6 10.7 14.4Nominal heating capacity** kW 7.0 8.1 10.6 13.1Operating we

12LegendFLA - Full load current, AIFM - Indoor fan motorLRA - Locked rotor current, AMCA - Minimum circuit current, AOFM - Outdoor fan motorRLA - Rate

13Fig. 12 - Wiring diagram (400-3-50)Max. wire size 6 AWGFieldpowersupplySee electricheat schematicElectricheatersUsed with accessoryelectric heat opt

14YCW2EGROTHERMOSTATAND SUBBASEUNIT CONTROL POWERSPLICE BOXBRNWHTYELGRNREDORNGROUND LUG(IN SLPICE BOX)BLUYELBLKGROUNDLEADLEGENDIEC – International El

15COMPRESSORACCUMULATOROUTDOOR COILINDOOR COILLCSLEGENDHPS – High Pressure SwitchLCS – Loss of Charge SwitchAccurater® Metering DeviceArrow indicates

163. Make the following inspections:a. Inspect for shipping and handling damages such asbroken lines, loose parts, disconnected wires, etc.b. Inspect

17Checking cooling and heating control operationStart and check the unit for proper control operation as follows:1. Place room thermostat SYSTEM switc

18Table 5 - Filter pressure drop, PaFilter size Air delivery, l/smm 236 283 330 377 425 472 519 566 614 661 707 755 802 850 896 944 991 1038508 x 508

19Defrost controlQuiet ShiftQuiet Shift is a field-selectable defrost mode, which willeliminate occasional noise that could be heard at the start ofde

2TABLE OF CONTENTSSAFETY CONSIDERATIONS ...

20Balance Point Worksheet - Metric0246810121416-30 -25 -20 -15 -10 -5 0 5 10 15 20Outdoor Air Temp. (Deg C)24303648Based on Indoor Entering Air of 21

21Indoor fan and motorNOTE: All motors are pre-lubricated. Do not attempt tolubricate these motors.For longer life, operating economy, and continuing

22FEEDER TUBESTUB TUBEDEFROSTTHERMOSTATFig. 22 - Refrigerant circuit Fig. 23 - Phase monitor control and LED indicatorsFig. 24 - Defrost thermostatLED

23Loss-of-charge switchThis switch is located on the liquid line and protects againstlow suction pressures caused by such events as loss of charge,low

24Check defrost thermostatThere is a liquid header with a brass distributor and feeder tubegoing into outdoor coil. At the end of one of the feeder tu

25Table 9 - Troubleshooting chartSymptom Cause RemedyCompressor and outdoor fan Power Failure - Call power companywill not start Fuse blown or circuit

26START-UP CHECKLIST (REMOVE AND STORE IN JOB FILE)I. PRELIMINARY INFORMATIONModel No. _____________________________________Serial No. _______________

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Order No: 15017-20, 02.2006 - Supersedes order No: New Manufacturer: Carrier Corporation, Indianapolis, USA.Manufacturer reserves the right to change

3RECEIVING AND INSTALLATIONCheck equipmentIdentify unitThe unit model number and serial number are stamped on theunit rating/identification plate. Che

4Required Clearance for Operation and ServiceTop view Rear viewRequired clearances to combustible materialTop of unit 356 mmDuct side of unit 50 mmSid

5Top view Rear viewFull louvreFull louvreFull louvreFull louvreRequired clearances to combustible materialTop of unit 356 mmDuct side of unit 50 mmSid

6Provide clearancesThe required minimum service clearances are shown in Figs. 1and 2. Adequate ventilation and outdoor air must be provided.The outdoo

7Corner weights Small cabinet Large cabinet50JZ 024 030 036 048Total weight 136 145 149 161Corner weight 1 28.5 28.5 29 34.5Corner weight 2 28 33.5 35

8Gask et aroundouter edgeInsulateddeck panGask et aroundductS/AR/AHVAC  unitbase*Gask etingouter flangeFlashing fieldsuppliedRoofing materialfield

9ABCMA-OPTIONALRETURNAIROPENINGOPTIONALSUPPLYAIROPENINGEVAP. COIL COND. COIL2"HANDHOLDFEEDHOOKMaximum allowable differenceA-B B-C A-C6 mm 6 mm 6